import axios from "axios";
import { MessageBox, Message, Notification, Loading } from "element-ui";
import store from "@/store";
import { getToken } from "@/utils/auth";

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 50000, // request timeout
  authServer: true,
});

let loadingInstance;

// request interceptor
service.interceptors.request.use(
  (config) => {
    // do something before request is sent
    loadingInstance = Loading.service({
      text: "正在努力处理中...",
      fullscreen: true,
      spinner: "el-icon-loading",
      background: "rgba(0, 0, 0, 0.7)",
    });
    if (getToken()) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers["authorization"] = "Bearer " + getToken();
    }

    if (config.authServer) {
      config.url = process.env.VUE_APP_AuthServer + config.url;
    }

    return config;
  },
  (error) => {
    loadingInstance.close();
    // do something with request error
    console.log(error); // for debug
    return Promise.reject(error);
  }
);

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
   */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  (response) => {
    loadingInstance.close();

    const res = response.data;
    let statusCode = response.status;

    if (statusCode === 200) {
      return res;
    }

    if (statusCode === 204) return null;

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 20000) {
      Message({
        message: res.message || "Error",
        type: "error",
        duration: 5 * 1000,
      });

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm(
          "You have been logged out, you can cancel to stay on this page, or log in again",
          "Confirm logout",
          {
            confirmButtonText: "Re-Login",
            cancelButtonText: "Cancel",
            type: "warning",
          }
        ).then(() => {
          store.dispatch("user/resetToken").then(() => {
            location.reload();
          });
        });
      }
      return Promise.reject(new Error(res.message || "Error"));
    }
  },
  (error) => {
    loadingInstance.close();
    let status = error.response ? error.response.status : null;
    if (status == 403) {
      let data = error.response.data;

      let tips =
        data && data.error
          ? data.error.code + ":" + data.error.message
          : "系统发生错误，访问被拒绝";

      Notification({
        title: "错误",
        message: tips,
        type: "error",
        position: "bottom-right",
        duration: 8 * 1000,
      });

      return;
    }

    if (status == 500) {
      Notification({
        title: "错误",
        message: "系统出现异常，无法完成操作",
        type: "error",
        position: "bottom-right",
        duration: 8 * 1000,
      });

      return;
    }

    console.log("err" + error); // for debug
    Message({
      message: error.message,
      type: "error",
      duration: 8 * 1000,
    });
    return Promise.reject(error);
  }
);

export default service;
